Plantronics EncorePro HW520V is a binaural (double ear) voice tube, over-the-head headset. Plantronics HW520V is built with user ergonomic in mind. It's very lightweight, and comfortable for all day use. Plantronics EncorePro HW520V is constructed with metal joints to help with headset longevity and reliability. A visual positioning guides for perfect positioning. HW520V is ideal for heavy telephone users like a call center. Retail Price $114.00

Plantronics EncorePro
HW510 is a single ear over-the-head only headset with soft ear cushions that an
designed for the typical call center or office employee. HW510 is built with
metal joints to improve durability and reliability. Plantronics HW510 has noise
canceling microphone with quality audio ensures more focus and with fewer missed
words. The design of the Plantronics EncorePro HW510 series also helps you meet
OSHA / Noise at Work regulations. . Retail
Price $106.00